Improvement in fire-proof safes



N. CUNSTABLE.

Fire-Proof Safes. No. 139,296. Patentedmay27,1a73

WITNEssEs y mvEN-ron QZ-@MRZ @dla/K632i al M7 y www@ M75.

UNITED STATES NATHANIEL CONSTABLE, OF GARBOLLTON, ILLINOIS.

IMPROVEMENT IN FIRE-PROOF vSAFES.

Specication forming part of Letters Patent No. 139,296, dated May '27, 1873; application filed November 14, 1872.

To all whom it may concern:

" and apertures, as will be fully described hereinat'ter.

In the drawings, Figure l` represents a perspective view of my invention, the outer wall of the air-chamber being broken awayto show `the safe A, and a portion of one of the tubes or iiues being also removed to show the location of the apertures in the rear Wall of the air-chamber. Fig. 2 is a horizontal cross-section on the line oi' the eductionilue G.

To enable others skilled in the art to make and use my invention, I will now proceed to describe fully its construction and manner of operation.

A represents the safe proper, constructed generally in any proper manner, and provided with a suitable door, as shown in Fig. 1. E represents an airchamber,formedV by walls of any proper material, which inclose the safe A upon all sides excepting its front. B B Bv B are ilues, which communicate at their outer ends with the air-chamber E through apertures in the corner of the walls, and at their inner ends with the central eduction-iiueG, as shown. The described construction is set in packing D, as shown in Fig. 2, in such manner that a space, F, is left between the door of the safe proper and an outer door, as

lshown. This outer door is made to t loosely,

or perforations are made through it, as may be desired. Communication is also made between the air-chamber E and the space F by means of apertures a a, shown in dotted lines,

Fig. 1, in the front 4wall of the air-chamber.

By means of the described construction,

when the safe is exposed to heat from any cause, no matter what its position may be, a current of air is caused to pass through the air-chamber in one direction or the other, the heated air of course ascending, while the cold air ent-ers to supply its place. By this means any excess of heat is carried o, and its contents are prevented from injury.

'Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

The box A, air-chamberV E, iiues B B B B and C, apertures a a a a a( a a a', with space F, constructed and arranged as described, A

for the purpose set forth.

This specification signed and witnessed this 8th day of November, 1872.

Witnesses: NATH-L. CON STABLE.

GHAs. D. MOODY, F. S. DAVENPORT. 

